Filter



H; J. SOMERS July 23, 1935.

FILTER Filed Aug INVENTOR. /fLBar Z 60175755 Patented July' 23, 1935 4UNITED STATES PATE-NT OFFICE FILTER Herbert J. Somers, Detroit, Mich. Application August 23, 1933,. Serial No. 686,384 z claims. (o1.l 18s-71a My invention relates to a new and useful improvement in a lter and particularly a filter adapted for ltering purposes generally, and primarily for air iilterin It is an object of the present invention to provide a filter so arranged and constructed that the same will shed dust and particularly when mounted in a vertical position.

Another object of the invention is the provision of a lter formed from a pair of retaining foraminous layers enclosing a lter of filtering material formed preferably from spun glass.

Another object of the invention is the provision of a lter whereby a maximum area of filtering element may be presentedjn a prede-termined opening.

Another object of the invention is the provision of a filter element substantially V shaped in cross section mounted in a suitable supporting frame.

Another object of the invention is the provision of a ltering element in which the maintenance cost will be reduced to a minimum and which may be easily and quickly cleaned.

Another object of the invention is the provision of a filtering element possessed of maximum eiliciency.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood by a reference to the accompanying drawing which forms a part of this specication, and in which,

Fig. 1 is a central sectional view of an air conduit showing the ltering element mounted in position and represented diagrammatically.

Fig. 2 is a perspective view of the ltering element with a part broken away.

Fig. 3 is a fragmentary sectional view taken on line 3 3 of Fig. 2.

Fig. 4 is a perspective view of a modified form of the invention.

Fig. 5 is a fragmentary sectional view taken on line 5-5 of Fig. 4. j

Fig. 6 is a fragmentary sectional view of a further modied form ofL the invention.

In the drawing I have indicated a housing 1 leading into which is lan air inlet conduit 8 and an outlet hood.' Positioned slightly above the opening of the inlet conduit 8 is a filtering element against which a spray I0 of water is directed by the nozzle II. Positioned above the nozzle II is another filter element. The ltering element comprises a retaining frame I2 formed of material channel shaped in cross section so as to provide the engagement ilanges I3 and I4. The filtering element comprises the layers I5 and I 6 of foraminous material. I prefer to use as these layers a, wire cloth ranging from 200 mesh to 3 mesh. The standard application is No. 6 5 mesh. The ller or mat I I formed from spun glass is positioned between and retained by the layers I5 and I6. When the No. 6 mesh isused in a standard application, the thickness of the mat may be 15/10000 of an inch to 5/1000 of an 10 inch, and the entire thickness of the mat and wire cloth layers I5 and I6 ranges from 5/100 of an inch to 25/'100 of an inch, and the layers I5 and I6 serve to prevent` excessive wear on 'the mat or filler I1 and also "serve to prevent a shifting of the ller or a matting of the same into lumps so that a iilter element of great durability is provided.

In view of the fact that the spun glass is nonporous and non-absorbent, the cleaning of the 20 lter element may be easily eifected. This cleaning may be accomplished either by turning a hose onto the lter element or by using a vacu cleaner thereon. In an installation such as shown in Fig. 1, the spray Il) will serve to retain the lter 25 against which it is directed in a clean and sanitary condition. Furthermore, because of the nature of the filter element when the sides are extended vertically or at an inclination to the vertical, they will serve to shed dust so that an 3U accumulation oi' dust on the filter element isv reduced to a minimum.

With the use of the V shaped lter, the range of filter surface or projected area is 20 to 1, that is,

the square feet of the filtering element may be 35 increased to 20 times the square feet of the opening in which the element is positioned. 'I'he projected area of the ltering element is of course dependent upon the depth of the filtering element and the retaining `frame is oi'such width or thick- 40 ness'as to accommodate the filtering element intended to be retained therein so as to snugly hold the same in position.

In Fig. 4, I have illustrated a iiltering element of a at type in which a retaining frame I 8 which 45 is U shaped in cross section embraces the edges of the wire cloth coverings I5' and I6 between which is engaged the iiller or mat I 'I of spun glass. Rivets I3 are projected through this lter.- ing element at various positions so as to serve to 50 bind the mat or filler in position and prevent its shifting within the wire coverings. Rivets I3 are also illustrated in Fig.. 3 as used with the form illustrated therein.

element formed from the flat filtering element shown in Fig. 4. In this Lform, the frame I2 is used and the flat iiltering elements are positioned in an inclined position to provide the V shaped structure in cross section.

Experience has shown that this filtering element will serve to remove even sulphuric acid from moist ai'r without material damage tothe :filtering element. In some applications, the filtering element is sprayed with a viscous oil, while in other applications the filtering element is assembled in a non-coated or dry condition.

It is obvious that the nitering element when mounted in the retaining frame as illustrated may be easily and quickly installed in position and removed and replaced.

While I have illustrated and described the preferred forms of construction of my invention, I do not wish to limit myself to the precise details of structure shown, but desire to avail myself of such variations and modifications as may come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Pat-A ent is:

1. A filter of the class described comprising a rigid frame having oppositely disposed Walls; a filter element retained in said frame and comprising a pair of foraminous covering members; a filler of filter material between said covering members, said covering members being arranged in sinuous formationgand engaging at opposite edges the inner faces f' oppositely disposed walls of said frame; and an inwardly projecting flange on the opposite edge of each of said walls for overlying and engaging said filtering element.

2. A lter of the class described, comprising; a rigid frame having oppositely disposed walls; a filter element retained in said frame and engaging at its opposite edges and its opposiite ends the inner surface of said walls and. comprising a pair of foraminous covering members; a ller of lter material between said covering members;

and an inwardly projecting iiange on each end of each of said walls, lying in engagement with the.

outer faces of said covering members; and securing means projecting through said covering. members and said filter for preventing matting of the same.

HERBERT J SOMERS. 

